Combined single-standard milling machine and counter-arm braces



1932- L. KELLENBERGER 1,870,054

COMBINED SINGLE STANDARD MILLING MACHINE AND COUNTER ARM BRACES Filed Nov. 12, 1930 5 Sheets-Sheet l Aug. 2, 1932. KELLENBERGER COMBINED SINGLE STANDARD MILLING MACHINE AND COUNTER ARM BRACES Filed Nov. 12, 1950 v 5 Sheets-Sheet 2 Aug; 2, 1932. L. KELLENBERGER 1,370,054

. COMBINED SINGLE STANDARD MILLING MACHINE AND COUNTER ARM BRACES Filed Nov. 12, 1950 5 Sheets-Sheet 3 Aug. 2, 1932. L. KELLENBERGER 1,870,054

COMBINED SINGLE STANDARD MILLING MACHINE AND COUNTER ARM BRACES Filed Nov. 12, 1930 5 Sheets-Sheet 4 1511111701: iii/124 Wall/3y Aug. 2, 1932- 1.. KELLENBERGER 1,370,054

COMBINED SINGLE STANDARD MILLING MACHINE AND COUNTER ARM BRACES Filed Nov. 12, 1930 5 Sheets-Sheet 5 z a Y 1 Patented Aug. 2, 1932 UNITED, STATES PATENT OFFICE LEONHARD nnmznnnnnsnn, or sr. GALLEN, SWITZERLAND COMBINED SINGLE-STANDARD MILLING MACHINE AND COUNTER-ARM BRACES Application filed November 12, 193O,.Seri a1 No. 495,135, and in Germany November 21, 1929. g

This invention relatesto the provision of counter-arm braces on single-standard milli spaceoutside the same is obstructed in any Way.

, Single-standard milling mach nes have been designed for the working-oi bulky or unwieldy work pieces, the dimensions of which over all exceed the size of the working table.

The efliciency of a milling machine is the greater, the more rigid the upper cross arm and the table support are connect d with the base plate, that is to say,.the less shakes are caused by the transmission ofthe working pressure. Provision has, therefore, been made, as is known, to connect the upper cross arm or cantilever with the table, or to support the table with respect to the base plate, bycounter-arm braces. In most of these known cases these braces, termed sometimes also scissors, must be detached from the ma I chine in order to render it possible to attach and detach bulky or unwieldy work pieces, milling arbors and supporting standards for such ones.

I am aware of the existence of counter-arm braces which are'continually connected with the machine, these machines having pillar guides which can be collapsed downwardly telescopically so as to afford free access to the working table. Most of the thus designed machines are, however, unnecessarily high, and with others where it has been endeavored to reduce theheight a part or" the circular pillar guide projects :beyond the tablewhereby,

however, the working of bulky or unwieldy work pieces is rendered diflicult. There exist alsocounter-arm braces that are continually connected with the respective machine in this manner that they can be shifted Vertically upwards, but these constructional forms suffer from the drawback that they extend too far upwardly into the space required for shaitings and belts, cranes, trolleys and travelling cabs, pulley blocks and thelike.

All these and other drawbacks of the known constructions have been obviated in my present improved combined single-standard milling machine'and counter-arm brace, in which the brace is so combined with the upper cross arm that it can be turned in a vertical plane, as well as shifted in a horizontal plane so that-sin its horizontalend position it is located at the side of said upper cross arm without diminishing the range of working and without entailing a greater height. The thus arranged counter-arm brace is, nevertheless, al-

ways ready for use at, or in connection with, the machlne and can be shifted and turned easily and quickly into its vertical end 'posi ploy only one of the braces, in which case the upper cross arm is centrically supported on only one side, but the milling arbor and the bearingsupport can be introduced into the machine without necessitating removal of that one brace. Finally, it is possible to employ the two members of the double coun ter-arm brace in crossed position, like scissors.

The invention is illustrated diagrammatically and by way of example on the accompanying drawings, on which Figure 1 is a side view of a one-standard milling machine having a counter-arm brace for connecting the upper crossarm with the vertically adjustable working tablecarrier; Figure 2 is a longitudinal View of the same machine; Figure Sis a view similar tolFig. land shows a slightly modified constructional form in which the counter cross brace connects the upper cross arm with the base plate of the machine; Figure 4 is a plan of the machine shown in Fig. 3; Figure 5 is a side-view of a machine having a vertically adjustable top and a stationary working table; Figure 6 is a longitudinal View of the same machine, and Figure 7 is a longitudinal view of a onestandard milling machine with crossed counter-arm braces.

With all these constructional forms the standard or main standard Z) is fixed to the base plate a of the machine, and at the standard is guided either the vertically adjustable working table, as in Figs. 1, 2, 8, t and 7, or the vertically adjustable milling rest, as in Figs. 5 and 6. Upon the standard I), or at it, is supported the milling spindle e which carries the milling arbor f and rotates it. The arbor f is supported in known manner by the bearing holders 9 and 9 The transverse top member 72. is supported at its overhanging end either relatively to the table carrier 0, as in Figs. 1, 2 and '2', or relatively to the table base 0 as in Figs. 5' and 6, or directly relatively to the base plate a, as in Figs. 3 and 4. The machine can, thus, be used with the top member or upper cross arm supported or not supported, just as required.

Concerning the further and chief details I refer first to Figs. 1 and 2, in which there are two counter-arm braces i and i which are guided in the so-called shoe is that can be turned at the top member or upper cross arm 72. by means of a bolt Z that is provided with a pinion m engaging a rack 07. provided at the brace a so that by turning said bolt by means of a crank 0 applied to it the brace '11 will be shifted in the guides of said shoe 7c. The brace i can be turned in the vertical plane and at the same time shifted horizontally (may be positively with the aid of a cam or cam disk), and it is in this way possible to bring it out of the range of working of the machine and to place it at the side of the top member or cross arm It, so that the brace cannot in any way interfere with the proper working of a bulky work piece, nor act as a hindrance outside the machine.

In Fig. 1 the counter arm brace '5 is shown in an oblique position in which it has been lifted and shifted in the shoe for about one half of its length, whereas the brace i is in vertical position.

The shoe 70 extends transversely with respect to the arm 71., and the brace 11 is arranged at one end of said shoe and the brace i at the other end of the same, as appears from Fig. 2. Each brace can be shifted in the shoe and can be turned by means of it with the aid of the members provided for this purpose and can assume a vertical, as well as a horizontal position; this latter position is indicated in Fig. 1 in dotted lines. The two braces are located at the two sides of the arm it, outside the same, and are supported in their horizontal position not solely by the guide ways in the shoe is, but also by rolls 1;, as shown in Fig. 1. lVhen the braces have been moved from this horizontal position into the vertical position (the oblique position of the brace i in Fig. l is one of the various possible intermediate positions), they are fixed in that position by means of grips or handles 7' which are firmly connected with bolts extending forth from the table 0, and there is a clamping plate 9 provided which is pressed by the grip 0 against the edge faces of said braces. The plate 9 has a slot 8 making the plate horizontally shiftable so that it can be shifted away first from the one brace and then, in opposite direction, from the other brace so that each thereof can be turned already when it is still in vertical position.

In the modification shown in Fig. 7 in which the two braces cross one another, each brace has at its lower end a vertical slot 16 through which the fastening bolt passes and outside of which a clamping nut is located upon that bolt. It is obvious that with this constructional form thetwo braces can be shifted independent from one another.

In Figs. 3 and 4 three clamping bolts and grips are provided, viz., an upper bolt with grip r, a lower bolt with grip W and a middle bolt with grip T The upper bolt engages the arm h, the lower bolt engages the base plate a, and the middle bolt engages the table 0. It is, thus possible, to connect all these members very rigidly with one another. 9, (7 and 9' are the clamping plates pertaining to said bolts and grips and acting upon the braces in accurately the same manner as has been described with regard to Figs. 1 and 2.

In the further modification shown in Figs. 5 and 6, the invention is applied to a onestandard milling machine in which the working table is not vertically adjustable, but in which, instead thereof, the member cl holding the milling arbor f is vertically adjustable along guides provided at the standard. The upper cross arm 72, is in this instance combined not with two braces, but only with one brace 2', resembling an H (Fig. 6) and there is, thus, between the upper legs of the H a free space affording access to the arbor f so that the brace need not be removed from its vertical position for the insertion of the suspended arbor carriers 9 and 9 The brace is also in this instance guided in the turntable shoe is and can be placed parallel to the arm h at the two lateral faces thereof, as indicated by dotted lines in Fig. 5. g and r, as well as (7 and W, are accurately such fastening and clamping members as the members in Fig. 3 denoted with the same letters of reference.

In Fig. 7 which has already been referred to in a preceding part of this specification, matters are practically just the same as with the other constructional forms, in that each of the two braces can be shoved upwardly in the appertaining shoe is and then turned in such a direction that it finally lies parallel to,

and at the side of the arm it.

There are in this case two individual shoes 70, the one at the right and the other at the left of the free end of said arm. The clamping plate 9 is practically just such a one as the clamping plate 9 of Fig. 2, in that there is in it a horizontal slot 8 permitting shifting of the plate to the right and to the left. Z denotes the pivots of the shoes is, e the arbor, and r is the clamping lever for the plate 9, accurately as in Fig. 1.

I claim:

1. A combined single-standard milling machine and counter-arm brace, comprising, in combination with the upper cross arm of said machine, a turnable guide member at the free end of said arm, a brace shiftable in said guide member and adapted to be turned together with it into a position in which it lies parallel to the said arm at a side thereof, and means for fastening the said brace in its operative vertical position.

2. A combined single-standard milling machine and counter-arm brace, comprising, in combination with the upper cross arm of said machine, turnable guide members at the free end of said arm, braces shiftable in said guide members and adapted to be turned together with them independent from one another into aposition in which each brace lies parallel to the said arm at a side thereof, and means for fastening the said braces in their operative vertical position.

3. A combined single-standard milling machine and counter-arm brace, comprising, in,

combination with the upper cross arm of said machine, turnable guide members at the free end of said arm, braces shiftable in said guide members and adapted to be turned together with them independent from one another into a position in which each brace lies parallel to the said arm at a side thereof, and means for fastening the said braces in their operative vertical position, the arrangement being such that the braces cross one another in this position, substantially as set forth.

In testimony whereof I aflix my signature.

LEONI-IARD KELLENBERGER. 

